Influence of High Temperature and Humidity on Polymer Composites Used in Relining of Sewage

Authors: Parastou Kharazmi, Folke Björk

Abstract:

Some of the main causes for degradation of polymeric materials are thermal aging, hydrolysis, oxidation or chemical degradation by acids, alkalis or water. The first part of this paper provides a brief summary of advances in technology, methods and specification of composite materials for relining as a rehabilitation technique for sewage systems. The second part summarizes an investigation on frequently used composite materials for relining in Sweden, the rubber filled epoxy composite and reinforced polyester composite when they were immersed in deionized water or in dry conditions, and elevated temperatures up to 80°C in the laboratory. The tests were conducted by visual inspection, microscopy, Dynamic Mechanical Analysis (DMA), Differential Scanning Calorimetry (DSC) as well as mechanical testing, three point bending and tensile testing.

Keywords: Composite, epoxy, polyester, relining, sewage.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1110942

References:

[1] Jürgen, A., Reinhard L., “Liner Testing in Europe-Methods, Standardization and Experience”, ASCE 2013; page 1151-1157.
[2] E. Wood, “Method of lining a pipe”, US 4009063 A, United States Patent, Feb.22, 1977.
[3] F. Geoffrey, I.G. Vickridge, “Planning Sewerage Rehabilitation and Maintenance-4, Sewers: Repair and Renovation”, Chapter 4, 1997, pp.69-83.
[4] United States Environmental Protection Agency, report, “State of technology for rehabilitation of wastewater collection systems”, July 2010.
[5] Manual M28, Rehabilitation of Water Main, American Water Work Association (AWWA), 2014
[6] Jotun online website accessed November 10, 2015, http://www.jotun.com/ww/en/b2b/paintsandcoatings/products/baltoflake. aspx.
[7] D.F. Parraa, L.P. Mercuria, J.R. Matosa, H.F. Britoa, R.R. Romanob, “Thermal behavior of the epoxy and polyester powder coatings using thermogravimetry/differential thermal analysis coupled gas chromatography/mass spectrometry (TG/DTA–GC/MS) technique: identification of the degradation products”, Thermochimica Acta 386 (2002) pp.143–151.
[8] P. Kharazmi, F. Björk, “Relining of Domestic Piping System with Rubber Filled Epoxy and Reinforced Polyester Composites” International Journal of Chemical, Molecular, Nuclear, Materials and Metallurgical Engineering Vol:9 No: 2, 2015, pp.284-287.
[9] I. McEwana, R. A. Pethricka, Stephen J. Shawb “Water absorption in a rubber-modified epoxy resin; carboxy terminatedbutadiene acrylonitrile-amine cured epoxy resin system”, August 1998, Polymer 40 (1999), pp.4213–4222.
[10] K. Yamanka, T. Inoue “Phase separation mechanism of Rubber-modified epoxy”, Journal of Materials Science, 1990 Jan, Vol.25 (1A), pp.241-245.